Comcast is adding some speed to its Internet services this week at no extra charge to its customers.

According to the cable and Internet provider, it's doubling the speeds of two of its Internet tiers: Xfinity Blast!, which will go from speeds of 25 Mbps to 50 Mbps, and Extreme 50, which will go from speeds of 50 Mbps to 105 Mbps.

"More customers are simultaneously connecting to the Internet through tablets, laptops and smartphones within their homes," said Cathy Avgiris, Executive Vice President and General Manager of Data and Communications Services at Comcast. "Whether it's to stream movies, upload photos, video chat with family and friends, or catch all of the Olympics action live on their tablets and connected devices, we want to ensure these customers are getting the speeds they need.

"We will continue to increase speeds as customer demands evolve. Comcast is committed to providing our customers with even more choices to get the best, fastest and most reliable experience possible."

Comcast also announced its latest Internet plan, Xfinity Platinum Internet. This new addition features download speeds of up to 305 Mbps and upload speeds of up to 65 Mbps as well as free Xfinity Signature Support.

The two existing tiers will double their speeds this week at no extra charge while Xfinity Platinum Internet will launch in certain Northeast markets like Boston, Hartford, Pittsburgh, Philadelphia, Harrisburg, Baltimore, Washington D.C., Richmond, New Jersey and Wilmington.

"A politician stumbles over himself... Then they pick it out. They edit it. He runs the clip, and then he makes a funny face, and the whole audience has a Pavlovian response." -- Joe Scarborough on John Stewart over Jim Cramer